Mercury MerCruiser Quicksilver — Cooling Hose Assembly — 8M0042174
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Mercury MerCruiser Quicksilver Cooling Hose Assembly 8M0042174
The Mercury MerCruiser Quicksilver 8M0042174 is a genuine OEM cooling-system hose assembly for select high-performance MerCruiser SCi engines. It is used in the water hoses and fittings circuit and supersedes OEM part 8M0010822. Mercury Marine lists 8M0042174 as no longer available, so confirm the part number and engine fitment before replacing an original hose.
Compatible Applications
- MerCruiser 850 SCi, serial 0M957579 and up
- MerCruiser 1075 SCi, serial 0M957032 and up
- MerCruiser 1075 SCi 9.1 L, 557 cu. in. V8
- MerCruiser 1200 SCi, serial 0M956534 and up
Confirm the engine model, serial number, OEM part number, and the applicable owner's manual or parts diagram before ordering. SCi engines use multiple cooling hoses with similar appearances and different routing.
Part Details
- Brand: Mercury MerCruiser Quicksilver
- OEM part number: 8M0042174
- Full Mercury reference: 32-8M0042174
- Catalog description: HOSE ASY-44.815
- System: Engine cooling, water hoses and fittings
- Supersedes: 8M0010822, also referenced as 32-8M0010822
- Availability: No Longer Available from Mercury Marine
Key Features
- Genuine OEM cooling-system hose assembly
- Designed for the listed high-performance MerCruiser SCi applications
- Direct identification by OEM part number 8M0042174
- Quantity shown in applicable cooling diagrams: one assembly
Technical FAQ
Is 44.815 the confirmed physical hose length?
44.815 is retained as Mercury's catalog naming convention. Other genuine parts-diagram data lists approximately 43.38 inches for the same part number, so use 8M0042174 and the engine serial number as the primary fitment identifiers rather than length alone.
What replaced 8M0042174?
No later Mercury replacement has been verified. This part is listed as No Longer Available.
When should the hose be replaced?
Inspect it for cracking, hardening, swelling, deformation, leakage, seepage, chafing, or damage found during cooling-system service. Allow the engine to cool fully before inspection or removal.
Related Parts
- 8M0042175, hose assembly
- 8M0042173, hose assembly
- 8M8021168, bypass hose restrictor kit
- 8M0007749, molded trim-to-fit hose
- 180766, worm-gear clamp
View the 1075 SCi cooling water hoses and fittings diagram for the applicable schematic reference.
Parts Desk Insights
Best use: Use this assembly when the original hose is identified as Mercury 8M0042174 on a compatible 850 SCi, 1075 SCi, or 1200 SCi cooling-system diagram.
Common mistake: Ordering by hose length alone can lead to the wrong cooling hose. Catalog sources use different length descriptions for this part number, so match the OEM number and engine serial number first.
Fitment guidance: Check routing, connection points, and nearby clamps against the original installation and the applicable owner's manual or parts diagram. If you are replacing a hose on an SCi engine, verify 8M0042174 before removing a serviceable original.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.